| 1 | PSS | TSSKB-Progress, Air Company | Callsign: Progress, Name changed to RKC Progress, Air Company | RUS | AVCODES |
| 2 | PSS | RKC Progress, Air Company | Callsign: Progress, Name changed from TSSKB-Progress, Air Company | RUS | AVCODES |
| 3 | PSS | TSSKB-Progress | | | ICAO1 |
| 4 | PSSB | PASSONS SPECIALIZED SERVICE INC | | | SCAC4 |
| 5 | PSSC | PERSON SHIPPING COMPANY LIMITED | | | SCAC3 |
| 6 | PSSD | PETRE, STEFAN SOFTWARE AND DESIGN D | | | SCAC4 |
| 7 | PSSE | PETERS SILVER STREAK EXPRESS LTD | | | SCAC3 |
| 8 | PSSF | POINT STAR SEAFOODS | | | SCAC4 |
| 9 | PSSG | PEARSONS SALVAGE INC | | | SCAC3 |
| 10 | PSSH | PSARA SHIPPING CORP MONROVIA LIBERI | | | SCAC3 |
| 11 | PSSJ | PSS TRANSPORTATION INC (DIV OF PRIN | | | SCAC3 |
| 12 | PSSJ | P S S TRANSPORTATION INC (DIV OF PS | | | SCAC4 |
| 13 | PSSK | PISCES TRUCKING INC | | | SCAC4 |
| 14 | PSSN | PASSMORE, A & SONS INC | | | SCAC3 |
| 15 | PSSO | PHOENIX SPECIALTY SOLUTIONS INC | | | SCAC4 |
| 16 | PSSP | PROTOS STEAMSHIP PTE LTD | | | SCAC3 |
| 17 | PSSP | PASSPORT PLUS FREIGHT COMPANY | | | SCAC4 |
| 18 | PSSQ | PRAIRIE STATE SYSTEM | | | SCAC3 |
| 19 | PSSQ | PORFIRIO SAUCEDA/ SANTA CRUZ | | | SCAC4 |
| 20 | PSSS | PSSI | | | SCAC4 |
| 21 | PSST | PASSIEU-STEWART TRUCKING | | | SCAC3 |
| 22 | PSSU | PENTALVER TRANSPORT LIMITED | | GB | BIC |
| 23 | PSSU | PENTALVER TRANSPORT LIMITED | | | SCAC4 |
| 24 | PSSV | PALMETTO SHIPPING & STEVEDORING CO | | | SCAC3 |
| 25 | PSSV | PIONEER SHIPMANAGEMENT SERVICES LLC | | | SCAC4 |
| 26 | PSSW | PSS WAREHOUSING AND TRANSPORTATION | | | SCAC4 |
| 27 | PSSX | SNOQUALMIE VALLEY RAILROAD [PUGET SOUND SNOQUALMIE VALLEY RAILROAD] | | | PWRC |
| 28 | PSSY | PALM SPA & SUPPLY INC | | | SCAC4 |
